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Science and Technology of Nuclear Installations
Volume 2015, Article ID 738019, 5 pages
Research Article

Monitoring of 220Rn Concentrations in Buildings of Kufa Technical Institute, Iraq

Department of Physics, Faculty of Science, University of Kufa, Box 221, Al-Najaf, Kufa, Iraq

Received 7 November 2015; Revised 19 November 2015; Accepted 22 November 2015

Academic Editor: Massimo Zucchetti

Copyright © 2015 Ali Abid Abojassim Al-Hamidawi. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper presents the measurements of thoron and the progeny in fifteen buildings in Kufa Technical Institute, Iraq, from June 2015 to April 2015 using RAD-7 detectors. Also, annual effective dose rate was calculated in all buildings under study. The thoron concentration varies from  Bq/m3 to  Bq/m3 with an average  Bq/m3. The concentration of thoron daughters was found to vary from 0.14 mWL to 1.44 mWL with an average  mWL. The annual effective doses due to thoron mainly vary from 0.042 mSv/y to 0.81 mSv/y with an average  mSv/y. The preliminary results in this study indicate that they may be suitable for evaluating the indoor 220Rn and its progeny concentrations whenever the public exposure to 220Rn and its progeny is taken into account. During this survey, the continuous difficulty in measuring thoron was also pointed out, due to its short half-life and faults in the measuring system.